/*
 * Copyright 2014-2022 Arx Libertatis Team (see the AUTHORS file)
 *
 * This file is part of Arx Libertatis.
 *
 * Original source is copyright 2002 Robert Ramey
 *
 * Boost Software License - Version 1.0 - August 17th, 2003
 *
 * Permission is hereby granted, free of charge, to any person or organization
 * obtaining a copy of the software and accompanying documentation covered by
 * this license (the "Software") to use, reproduce, display, distribute,
 * execute, and transmit the Software, and to prepare derivative works of the
 * Software, and to permit third-parties to whom the Software is furnished to
 * do so, all subject to the following:
 *
 * The copyright notices in the Software and this entire statement, including
 * the above license grant, this restriction and the following disclaimer,
 * must be included in all copies of the Software, in whole or in part, and
 * all derivative works of the Software, unless such copies or derivative
 * works are solely in the form of machine-executable object code generated by
 * a source language processor.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
 * SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
 * FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 */

#ifndef ARX_UTIL_CAST_H
#define ARX_UTIL_CAST_H

#include <limits>
#include <type_traits>

#include "platform/Platform.h"


namespace util {

template <typename To, typename From>
arx_force_inline constexpr bool is_in_range(From value) noexcept {
	static_assert(std::is_integral_v<To>);
	if constexpr(std::is_signed_v<From> && !std::is_signed_v<To>) {
		if(value < From(0)) {
			return false;
		}
	}
	if constexpr(std::is_floating_point_v<From> || sizeof(From) > sizeof(To)) {
		if constexpr(std::is_signed_v<From> && std::is_signed_v<To>) {
			if(value < From(std::numeric_limits<To>::min())) {
				return false;
			}
		}
		if(value > From(std::numeric_limits<To>::max())) {
			return false;
		}
	}
	ARX_UNUSED(value);
	return true;
}

template <typename To, typename From>
arx_force_inline constexpr To to(From value) noexcept {
	arx_assume(is_in_range<To>(value));
	return static_cast<To>(value);
}

} // namespace util

#endif // ARX_UTIL_CAST_H
